Terrestrial Mollusca from Norfolk Island. 533 



radiately striate ; suture well impressed ; umbilicus mode- 

 rately wide, deep, well-like ; labium simple ; aperture 

 obliquely sublimate. 



Alt. 5, diam. maj. 1*25 mm. 



Hob. Norfolk Island, under dead leaves (Macgillivray, 

 June 1855). 



Johannesoconcha pusillior, sp. n. 



Shell differing from J. multtvolva in its smaller siz^, more 

 depressed form, and less well-like umbilicus, the margin of 

 which is much less abrupt. 



Alt. '25, diam. maj. 1'25 (nearly) mm. 



Hab. Norfolk Island. 



Johannesoconcha minuscula, sp. n. 



Shell very minute, depressedly turbinate, in subfossil con- 

 dition white; whorls 3^, regularly increasing, marked only 

 with faint transverse growth-stria? ; suture impressed ; 

 umbilicus moderately narrow, deep, well-like ; columella 

 margin obliquely descending; labrum acute; aperture very 

 broadly and depressedly subcrescentic. 



Alt. "25, diam. maj. 1 mm. 



Hab. Limestone Quarry, S.E. coast of Norfolk Island, 

 where it occurs in a subfossil state (R. Bell). 



Charopa mathewsi, sp. n. 



Shell small, orbicular, planulate above, widely umbilicate 

 below, chestnut-coloured throughout; whorls 4^-, regularly, 

 but rather slowly, increasing, the last descending, the 

 embryonic whorls smooth, the remainder sculptured with 

 regular, radiate, rounded costula?, the interstices being 

 occupied by fine, closely set, transverse striae crossed by very 

 fine and indistinct spirals ; columella margin slightly re- 

 flexed above, obliquely descending ; labrum simple ; aperture 

 obliquely subquadrate. 



Alt. *75, diam. maj. 2*5, diam. min. 2*25 mm. 



Hab. Ball's Bay, Norfolk Island {R. Bell). 



Charopa sororcula, sp. n. 



Shell allied to C. mathewsi, but lighter in colour, being of 

 a yellowish-brown tint ; if is also much smaller, though 

 having the same number of whorls, the sculpture is finer, 

 though similar in other respects, the apex is slightly exserted, 

 the last whorl does not descend, and the aperture is narrowly 



